7-Acyl-3-(ureidoalkyl substituted tetrazolylthiomethyl) cephalosporins, antibacterial compositions containing them, and methods of treating bacterial infections using them

Abstract

The compounds of this invention are cephalosporins having various acyl substituents at the 7-position and an ureidoalkyl substituted tetrazolylthiomethyl group at the 3-position of the cephem nucleus and intermediates for the preparation thereof. The 7-acylated compounds have antibacterial activity.

What is claimed is: 
     
       1. A compound of the formula: ##STR8## in which: R 1  is an acyl group of the formula: ##STR9## where: Z is methyl, trifluoromethyl, trifluoroethyl, pyridyl or cyanomethyl; m is zero to two; and   n is two to five, or a non-toxic pharmaceutically acceptable salt thereof.     
     
     
       2. A compound according to claim 1 in which n is two. 
     
     
       3. A compound according to claim 1 in which Z is trifluoromethyl or cyanomethyl. 
     
     
       4. A compound according to claim 3, said compound being 7-cyanomethylthioacetamido-3-[1-(2-ureidoethyl)tetrazol-5-ylthiomethyl]-3-cephem-4-carboxylic acid. 
     
     
       5. A compound according to claim 3, said compound being 7-trifluoromethylthioacetamido-3-[1-(2-ureidoethyl)tetrazol-5-ylthiomethyl]-3-cephem-4-carboxylic acid. 
     
     
       6. An antibacterial pharmaceutical composition comprising a compound as claimed in claim 1 and a pharmaceutically acceptable carrier therefor. 
     
     
       7. An antibacterial pharmaceutical composition comprising a compound as claimed in claim 4 and a pharmaceutically acceptable carrier therefor. 
     
     
       8. A method of treating bacterial infections comprising administering internally by injection to an infected or susceptible warm-blooded animal an antibacterially effective but nontoxic dose of a compound as claimed in claim 1. 
     
     
       9. An antibacterial pharmaceutical composition comprising a compound as claimed in claim 5 and a pharmaceutically acceptable carrier therefor. 
     
     
       10. A method as claimed in claim 8, in which the compound is 7-cyanomethylthioacetamido-3-[1-(2-ureidoethyl)-tetrazol-5-ylthiomethyl]-3-cephem-4-carboxylic acid. 
     
     
       11. A method as claimed in claim 8, in which the compound is 7-trifluoromethylthioacetamido-3-[1-(2-ureidoethyl)tetrazol-5-ylthiomethyl]-3-cephem-4-carboxylic acid.